Police have said the stabbings that took place at Manchester Victoria Station last night were terror related.
A 25-year-old man has been arrested on suspicion of attempted murder after the incident which left three people - including a police officer - with knife injuries.
The three victims were taken to hospital with 'serious' but non-life-threatening injuries.
Prime Minister Theresa May has tweeted to say her 'thought are with those who were injured'.
The three victims, a woman in her 50s, a man in his 50s and a member of the British Transport Police reportedly in his 30s, were attacked last night by a man with a 'long knife'.
Police has said counter terrorism offers were leading the inquiry, but that they were 'keeping an open mind on the motive', the BBC reports.
Home Secretary Sajid Javid tweeted to offer his well-wishes to the victims:
Eyewitness Sam Clack tweeted to say: "Just been very close to the most terrifying thing. Man stabbed in Manchester Victoria station on tram platform.
"Feet from me, I was close to jumping on the tracks as attacker had long kitchen knife. Totally shaken. This is seriously messed up."
Another witness told the Mirror: "I heard the most bloodcurdling scream I've ever heard and turned to see everyone running towards me.
"Some guy told me to run, keep running. All he kept saying was just keep running. I jumped off the tram track and started to run down the tram lines and hid behind some concrete slabs under one of the arches.
"I had no idea what had happened at this point, I was just really scared, I didn't know if I was going to die.
"Eventually we walked back and I'd heard people were stabbed. It's so sad, I just can't understand how people can choose to hurt innocent people in this way.
"I'm in awe of the BTP, as soon as I heard the screaming they were running to the scene to protect everyone. They are heroes!"
Rail and tram services from the station were cancelled last night, but today Manchester's Metrolink has tweeted to say services will resume.
Featured Image Credit: PA